Ashcroft ATE-100 Handheld LCD Digital Calibrator - Manual (Page 67)

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Revision 4.6 3/2004
Step 8 Enter the 5 digit calibration access code pro-
vided with the calibrator base unit.
Access code ?
12345
Step 9 With the correct access code displayed press
the enter key.
ENT
The calibrator will respond by displaying:
Electrical
Pressure
Step 10 Using the down arrow key select the word
“Pressure”. When selected, the word Pressure will flash
on the display:
Electrical
Pressure
Step 11 With the word “Pressure” flashing press the
enter key.
ENT
The calibrator will respond by displaying:
Zero Cal
Yes No
Step 12 To perform zero calibration (adjustment) select
Yes and press the enter key.
ENT
To skip zero adjustment and proceed to full scale cali-
bration (adjustment) select no and press the
enter key.
Step 13 With the pressure module at zero pressure,
press the enter key.
ENT
note: The following should be done to zero each type of
pressure module:
Pressure
Type
Zero Source
Absolute – Apply absolute zero using vacuum pump.
Gauge –
Vent to atmosphere
Compound – Vent to atmosphere
Differential – Vent both ports to atmosphere
Vacuum –
Vent to atmosphere
The calibrator will respond by displaying:
xxxxx working
Where xxxxxx is the voltage being read from the Quick
Select pressure module and the flashing word “working”
indicates that the calibrator is making the internal adjust-
ments necessary for the recalibration.
After approximately 3 seconds the calibrator will dis-
play:
Full Scale Cal
Yes No
Step 14 To perform full scale calibration (adjustment)
select Yes and press the enter key.
ENT
To skip full scale adjustment and proceed to re-lineariza-
tion process select no and press the enter key.
Important Note: If full recalibration of the pressure
module is desired the zero and span adjustment must
be reset through these procedures prior to entering the
linearization mode. The zero and span values established
in these procedures will be used for the zero and span
values of the new calibration data. If zero and span are
not reset at this time the recalibration will use the values
for zero and span stored in memory from the previous
zero and span activities.
Step 15 Apply the full scale pressure for the Quick
Select pressure module being calibrated.
(Coming as close as possible to the full scale measure-
ment range of the pressure module being calibrated)
with the pressure applied press the enter key.
ENT
The calibrator will respond by displaying:
Enter pressure
applied .00000
Step 16 Using the keypad enter the exact value of the
pressure applied to the Quick Select pressure module.
Be certain to use the engineering unit in use for the left
Quick Select module when calibration activities com-
menced.
Enter pressure applied
100.01
In the above example a pressure of 100.01 is being
applied to the left Quick Select pressure module.
Step 17 With the full scale (F.S.) pressure applied and
the corresponding value shown on the display, press the
enter key.
ENT
The calibrator will respond by displaying: