ABB AK101 - Electrical Calibration Page (LOWER DISPLAY) - AK101 Only

39
ELECTRICAL CAL
Calibrate No
xxx.x
mV Zero (0.00mV)
xxx.x
mV Span (10.00mV)
Adjust RTX Zero
Adjust RTX Span
Yes No
Yes
Notes.
1) The 4689 instruments incorporate a two-point calibration sequence requiring both zero and
span inputs for a calibration. It is not possible to adjust the range zero or the range span
scale points independently.
2) The instrument is fully calibrated before despatch and should not normally require further
calibration.
Calibration
Proceed as described in Section 8.3 Calibration, but apply a signal input equivalent to range
zero (0.0mV). Allow the instrument display to stabilize.
Advance to next parameter
Calibration Range Zero (0% H2 in CO2)
Proceed as described in Section 8.3 Calibration, but apply a signal input equivalent to
%H2 IN PURGE GAS* range zero (0.00mV).
Allow the instrument to stabilize.
Advance to next parameter
Calibration Range Span (100% H2 in CO2)
Apply a signal input equivalent to %H2 IN PURGE GAS* range span (10.00mV).
Allow the instrument display to stabilize.
Advance to next parameter
Adjust Retransmission Zero
Adjust the retransmission zero (e.g. 4.00mA) to the appropriate zero value.
The retransmission zero signal is either 85% or 80% H2 in Air as selected in Set Up Outputs
Page.
Allow the output signal to stabilize.
Advance to next parameter
Adjust Retransmission Span
Adjust the retransmission span (e.g. 20.00mA) to the appropriate maximum value.
The retransmission span signal corresponds to 100% H2 in Air.
Allow the output signal to stabilize.
Return to Operating Page.
10.2.4 Electrical Calibration Page (LOWER DISPLAY) – AK101 only
10 PROGRAMMING...
*Note. Purge gas options include:
CO
2
(Carbon dioxide)
N
2
(Nitrogen)
Ar (Argon)