Dr. Bridge KHG User manual
WWW.KHGUARDIAN.CO M
V8.0C Profashional Edition 2017-01-09
Contents
Main Features
Installation Instruction
Main Display
KHG System Setup
The Meaning of Log Field
Error Message and Troubleshooting
Additional User Instructions
The KHG exterior & features
Main Control of KHG
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P5
P1
P5
P7
P10
P10
P12
P1
P2
Quick Install
User Manual
Appendix P15
Main Features
The resolution of the Standard Edition is 0.33 dKH.
Continuous measuring test accuracy is +/- 0.33dKH.
Measurement range: 5 -12 dKH.
Use only one reagent for each test. The used reagent goes directly to the aquarium without any safety
concern. Each test only takes around 3 ~ 4 cc. reagent.
It supports remote terminal function to monitor and control the instrument via any web browser on the same
local network. No need to install any software or APP. Simply use web browser for operation.
SD memory card preinstalled for the long-term data logging.
Version “C” has an automatic dKH controlling feature. It automatically calculates how much sodium
bicarbonate solution should be added to the aquarium with the reference of the desired dKH target value,
aquarium total water volume, and current testing value. Then the controller dose-in the solution accordingly.
Automatic measuring interval can be set from 30 to 240 minutes. Each measurement takes about 3 to 7
minutes.
With the “C” version, no need to change the existing calcium reactor and alkalinity dosing. We do
recommend to slightly decrease your current dKH dosing parameters below your desired target, and let
KHG do the nal ne tuning for your tank automatically.
Installation Instruction
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User Manual
Display Panel.
Control Button.
Sodium Bicarbonate Pump.
Tank Water Input Pump.
Waste Water Purge Pump.
pH Probe.
Observation Window.
Probe Holder.
Reaction Chamber.
The KHG exterior & features
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(Figure 1)
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Number 1 button.
Number 2 button.
Number 3 button.
Number 4 button.
Current system status.
The time remaining until next testing.
The last pH value obtained by the KHG.
The last dKH value obtained by the KHG.
When installing KHG, please ensure the KHG is placed on level ground and is completely upright (Figure
4). At least a construction grade levelling tool must be used to make sure the placement of KHG is level on
the X, Y, and Z axis. Complete levelling is crucial as to keep the sodium bicarbonate solution from dripping
on the optical and electronical components before entering the reactor chamber. KHG will fail if solutions
contaminates the optical and electronics.
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7 8
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KHG display panel
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(Figure 3)
User Manual
Quick Install
(Figure 2)
DC 12V Power
LCD Display Panel
pH Probe
Water Form Tank
Purge to Tank
Reagent Solution Sodium Bicarbonate
Ethernet (RJ45)
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KRS
S.W IN
S.W OUT
S.S IN
S.S OUT
pH probe calibration instruction :
SW IN
Saltwater in. This tube connects to your tank water
for the sample to be taken. Source of tank water must
be ltered by 500 micron or less to keep tubes free of
blockage. Please make sure the medical grade check
valve (included with KHG) is installed in the right
direction.
SW OUT
Saltwater OUT. This tube are for purging reaction chamber water. Please make sure the medical grade
check valve (included with KHG) is installed in the right direction.
S.S. IN
Sodium Bicarbonate Solution IN. This tube connects to your Sodium Bicarbonate Solution Reservoir.
S.S. OUT
Sodium Bicarbonate Solution OUT. This tube connects to your tank or sump. It delivers the sodium
bicarbonate solution to your tank to use in combination with the KH auto correction feature of KHG.
KS
Reagent Solution. This tube connects to the KHG reagent solution bottle.
Please insert the pH probe into pH 7.0 calibration solution of at least 1.5 cm deep.Press and hold number
2 and number 4 buttons simultaneously for 3 second until you hear a beep and release both buttons.
Now the pH 7.0 calibraion is done.
Rinse pH probe with distilled water, and pat dry with ne tissue paper. When drying, please do not twist
dry probe surface with the tissue paper as this will damage the coating on the probe sensor, and will
render the probe inaccurate.
Please keep KHG no more than 100 centimetres away
from your tank. It is necessary to keep KHG within this
distance to ensure the sample delivered by the SW IN
tube is same as your concurrent tank water.
For "C" model, there are 5 silicon tubes ends that
connects outside of the KHG. The uses of each are as
follows :
Before proceeding to pH 4 calibration, please rinse pH probe with distilled water and pat dry with ne
tissue paper. Care must be taken not to twist dry with tissue paper as described in point “a” above.
Page 3
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(Figure 4)
User Manual
You must perform the 2 point calibration in the order of pH7 rst and pH4 follows. You must complete all
calibration before proceeding to next installation step. 2 point calibrations must be performed every time
you attempt to recalibrate.
Please insert pH probe into pH4 solution of at least 1.5 cm deep.Press and hold number 1 and number
3 buttons simultaneously for 3 seconds until you hear a beep and release both buttons. Now the pH 4.0
calibration are complete.
Please insert the calibrated pH probe until the cap of pH probe is
level with the Red line. (Figure 5) Hand tighten the white knob to
secure pH probe in place. Over tighten the white knob could break
the glass sleeve of pH probe.
Please recheck and make sure all tubes are connected as instructed
above. Go to your browser and click on “SW Tube De-Gas” to purge
air from your tank water inlet tube. First attempt to draw tank water
and purge air, KHG may show NSWE error message (No Salt Water
Entering). To cancel the error message, you should press and hold
the number 4 button until you hear a beep and release button.
Please click on the “SW Tube De-Gas” for as many times as out of
the inlet tube.
Please click on the “KS De-Gas” on your browser
to purge air from your KHG reagent solution tube.
Please look into the observation hole (Figure 6) until
you see reagent solution is dropping at the rate of
one drop per 3 seconds. Please let reagent solution
to drop at least 10 times before cancelling the air
purging by clicking on the “RESET” in your browser
screen, or press and hold number 4 button for 3
seconds to stop the purging procedure. If KHG shows
“KS_ERR”, there may be blockage in the tube and
KHG will force into areboot. At the same time please check if the tube is free from blockage and make sure
there are reagent solution in the storage bottle.
Next please key in your last known dKH value into the “Last KH (dKH)” under the “System Setup”. Please
also make sure the number you entered is not 1.5 dKH away from your desired alkalinity target level (“KH
Auto Correction”). Next click on “SAVE” to save your settings and KHG will enter a forced reboot.
After a successful reboot of KHG, the LCD display will show STANDBY. Please enter KHG main control
page in your browser, and click on “GET dKH”. KHG will perform a full test. After the test has been done,
KHG will return back to standby mode.
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(Figure 6)
(Figure 5)
User Manual
required until tank water are owing
Observation hole
Please make sure the RJ45 network cable is securely attached and connect
KHG to your home router or LAN. After switching on KHG, the display panel
will show the IP and port number automatically assigned by the network DHCP
(Figure 7). Please write down the IP and port number shown on the display,
and enter it to the browser of your computer or mobile device to access controls
of the KHG.
If your network DHCP did not automatically assign an IP to KHG, the default IP
will be 192.168.1.10.
For example, if the display were shown as Figure 7, then you should enter
http://172.22.20.158:8090 into your browser. When the login window appears
as Figure 8, enter the password (default setting is "Admin") and Click Login
button, then you will be able to access the controls of KHG as Figure 9.
Page 5
Main Control of KHG
Main Display
Get dKH
Press to test and obtain KH value. Counter will be reset after the
testing is completed.
Purge Chamber
Press to purge and empty all solutions in the reactor chamber.
This must be performed every time you intend to move the
KHG. It is crucial to purge reaction chamber to prevent solutions
damaging the optical lens and other electronic components.
Failure to purge chamber could result in KHG failure.
SW Tube De-Gas
Press to pump saltwater sample into the reaction chamber. This
is normally only used at initial setup of KHG, or after reassembly
of the step motor head. By pressing it, saltwater will pump water
up the feeder tube, purging gas from the tube. If there were
blockage in the feeder tube, after a preset amount of time no
water has been pumped into the reaction chamber, the display
would show S.W_ERR error message.
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Please note, if the alkalinity obtained by the KHG deviate by 1.5 dKH from your desired dKH setting (“KH
auto correction”), KHG will show error messages. KHG will assume this is a major deviation and will
suspend all subsequent dosing of sodium bicarbonate solution and enter into a forced reboot and return
back to standby mode. If the tested value is larger than the “KH auto correction” by +1.5 dKH, KH>ERR will
appear. If the tested value is less than the “KH auto correction” by -1.5 dKH, KH<ERR will appear.
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(Figure 7)
(Figure 9)
User Manual
(Figure 8)
Last KH: n.nn
This is the last dKH value obtained by the KHG.
pH: n.nn
This is the last pH value obtained by the KHG.
CKI = nn
This is the testing interval (unit: minutes). Testing Interval
can be changed in the KHG system setup.
KS De-Gas
Press to purge gas from the feeder tube of KH reagent solution. Please look into the observation window to
check if KH reagent solution are owing into the reaction chamber. After seeing reagent solution is owing
and the LED is blinking steadily, please press the “RESET” button to stop.
ENG Mode ON
Advanced function only. Do not use unless being instructed by a qualied KHG support staff.
ENG Mode OFF
Advanced function only. Do not use unless being instructed by a qualied KHG support staff.
Test KH doser
Press to test if the Sodium Bicarbonate solution is pumping.
Test accelerator
Press to test if the reaction chamber agitator is functioning normally.
RESET
Press to reset warning signals. Also used to stop KS De-Gas function.
Refresh
Press to refresh your browser display on your computer or mobile devices.
Display Record
Press to display the log.
Reboot
Press to force reboot of the KHG.
System Setup
Press to enter into system setup screen.
Denition of the data shown on the bottom of the main control page (Figure 10):
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User Manual
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