GE AquaTrans AT868 - Setting Up Analog and Totalizer;Frequency Outputs - OPTN

September 2004
4-2 Calibration
Calibration (cont.) To calibrate the analog outputs, complete the following steps:
Accessing the Calibration
Menu
1. Press [ESC], [ENTER], [ESC] in sequence to enter the user program.
2. Press [
X] until CALIB appears and press [ENTER].
3. Press [
X] until SLOT0 appears and press [ENTER].
4. Press [
X] until A or C appears and press [ENTER].
Calibrating the Low Point 1. Press [X] to select 4 mA and press [ENTER].
2. Press [
X] to select UP or DOWN to adjust the reading until the
ammeter reads exactly 4 mA. Press [
ENTER].
3. When the desired reading is achieved, select
STORE. If the
ammeter reading cannot be adjusted with ±5.0 μA of the 4 mA
setting, select
ABORT to end the calibration and contact GE for
assistance.
Calibrating the High Point 1. Press [X] to select 20 mA and press [ENTER].
2. Press [
X] to select UP or DOWN to adjust the reading until the
ammeter reads exactly 20 mA. Press [
ENTER].
3. When the desired reading is achieved, select
STORE. If the
ammeter reading cannot be adjusted with ±5.0 μA of the 20 mA
setting, select
ABORT to end the calibration and contact GE for
assistance.
Testing Linearity To test the linearity of the analog outputs, complete the following
steps:
1. Press
[ESC], [ENTER], [ESC] in sequence to enter the user program.
2. Press [
X] until CALIB appears and press [ENTER].
3. Press [
X] until SLOT0 appears and press [ENTER].
4. Press [
X] until A or C appears and press [ENTER].
5. Press [
X] to select Test and press [ENTER].