MKS SENTRY 1510A - Troubleshooting: Pressure vs. Set Point

Instruction Manual #122162 47
Replace Sentry 1510
Is the TIM-100/120 power on?
Turn on TIM-100/120
power
Is the desired set point indicated
next to PresSP?
Is set point controlled
locally at the TIM-
100/120 or via the
analog 0-5 VDC?
No
0-5 VDC
Yes
Are all downstream dampers fully
open?
Ensure StptMode is set
to Single and “PresSP1”
equals your desired set
point.
Local Control
Yes
Fully open all dampers.
No
Is N2 Supply on and between 40
- 100 PSI?
Is process pressure sense line
connected?
Is process chamber fully sealed?
Check all fittings on process side
of the Sentry 1510 for leaks.
Yes
Yes
Yes
Yes
Turn on N2 and adjust
regulator for 40 - 100 PSI
Connect process sense
line
Seal chamber
Eliminate leaks
Yes
No
No
No
No
Ensure StptMode is set
to Analog
Verify connections to your process tool.
(See installation and setup instructions.)
Yes
Verify that “Aux In”
parameter equals the
desired voltage (5000=
5.000 V). Verify line
voltage to the TIM.
Yes
No
Set TIM-100/120
Parameter StepLim
to Off
Is the TIM-100/120 Parameter
Step Limit Off?
No
Yes
Is the P-Trap filled with fluid or
drain isolation valve closed?
Fill P-Trap or close
isolation valve
No
Contact Technical Support or replace
the TIM-100/120.
Yes
7.2.2 Measured Process Pressure is Greater than Set Point