Differences

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--- installation_fp_sci [2023/08/18 09:35]
noji Formatting
+++ installation_fp_sci [2023/08/18 10:19]
noji [Zeroing PTs]
@@ Line 81: / Line 81: @@
 ===== Zeroing PTs =====
-  * When readings of the PTs (PT1 [S800_GHS:CMG_D2708A:VP_RD], PT2 [S800_GHS:CMG_D2703A:VP_RD], and PT3 [S800_GHS:CMG_D2708C:VP_RD]) are off (e.g. 1 Torr when pumped down), these need to be zeroed.
+  * When readings of the capacitance manometers (PT1 [S800_GHS:CMG_D2708A:VP_RD], PT2 [S800_GHS:CMG_D2703A:VP_RD], and PT3 [S800_GHS:CMG_D2708C:VP_RD]) are off (e.g. 1 Torr when pumped down), these need to be zeroed.
+  * **Before “zeroing” a pressure gauge. Make sure it is completely bottomed out.** This would correspond to the GHS being in “Vent” mode and the TMP being on. If the IG is on and shows that the system is under High Vacuum (<10-3 Torr) you can go ahead and zero the gauge.
+  * Here are instructions with screenshots by Josh:
+    * {{::zeroingpressuregauges1.png|}}
+    * {{::zeroingpressuregauges2.png|}}
+    * {{::zeroingpressuregauges3.png|}}
   * The relevant PVs are "ZERO_CMD" instead of "VP_RD", e.g. S800_GHS:CMG_D2708A:ZERO_CMD for PT1. Send "1" to zero these PTs.

S800 Documentation