33
9900 Transmitter
pH Setup Checklist
1. Make sure pH sensor type is selected
(see System Setup Menu, page 25).
2. Set the Temperature Units (°C or °F).
3. If LOOP is used, set the minimum and maximum 4 to 20 mA setpoints.
4. Perform calibration (EasyCal, Standard or Standard and Slope).
5. Set Last Cal Date and initials.
6. Select source for Open Collector and Relay output (pH or Temp).
7. If desired, set up relay functions for your own application.
This is the normal display
and does not time out.
pH
VIEW Mode Menu
Displays temperature at the sensor.
Displays the millivolt input from the electrode. Use this display to determine the relative condition of your
electrode during periodic calibration. (7 pH buffer = 0 mV, ± 50 mV)
(2751 preamp only, 9900 Generation IV or greater) Displays last
AUTOMATED
or
MANUAL GLASS
IMPEDANCE
measurement.
Press
►
to MANUALLY measure GLASS IMPEDANCE.
AUTOMATED GLASS IMPEDANCE update time is set under the pH INPUT menu (see next page).
NOTE:
While AUTOMATED/MANUAL GLASS IMPEDANCE measurement is in progress, all outputs are
held and an "UPDATING" message will be displayed until the measurement is completed.
(2751 preamp with memory chip enabled sensors only, 9900 Generation IV or greater)
Press
►
to access sensor data stored in sensor memory chip.
NOTE:
Pressing
▲
+
▼
, or changing to a sensor without a memory chip, while viewing SENSOR DATA,
will return the 9900 to the top VIEW mode display (current pH measurement).
(2751 preamp with memory chip enabled sensors only, 9900 Generation IV or greater)
Sub-menu of stored sensor data, accessed by pressing
►
on the above SENSOR DATA menu.
SENSOR DATA includes:
Sensor Serial Number (S/n), Sensor Model Number (MOD), pH Slope, pH Offset, Temperature Offset,
Factory Reference Impedance, Total Usage Time (HRS), Minimum pH value measured (MIN PH),
Maximum pH value measured (MAX PH), Minimum Temperature value measured (MIN TEMP),
Maximum Temperature value measured (MAX TEMP).
Displays the 4 to 20 mA LOOP output.
Bottom line shows one of three states (OFF, ON, PLS) for each of the three relays.
Displays remaining time for CYC LOW or CYC HIGH mode. The relay(s) will remain ON while counting down.
NOTE:
(Reset the Timer) In the RELAY menu, select TEST RELAY function.
The timer will reset to 0 if the condition no longer exists when the TEST is performed.
The timer will restart if the condition still exists.
pH
