Topcon AP-L1A - 10 Setting the Prism Constant Value

10. SETTING THE PRISM CONSTANT VALUE
10-1
10. SETTING THE PRISM CONSTANT VALUE
The prism constant value of Topcon is set to zero. When using Pin-pole prism set L1 type, Pin-
pole prism holder L1 type, Prism unit A2 type, or a prism other than Topcon's, it is necessary to set
the prism constant correction value specific prism.
Once you set the correction value for prism constant, it is retained after power OFF.
Prism type (TOPCON) Prism constant value Prism constant correction value
Pin-pole prism set L1 type
Pin-pole prism holder L1 type
+22mm or 0mm -22mm or 0mm
Prism unit A2-type -14mm +14mm
Near distance prism for AP-S1 +22mm -22mm
Normal Topcon prism 0mm 0mm
 Setting example : The prism constant value, +22mm.
Operating procedure Operating key Display
 Set mode as Set Audio mode. [F3]
S/A
PSM: 00 SIG : 60
PPM: 83
EXIT PSM PPM T-P
 Press [F2](PSM)key. [F2]
PRISM SET
PSM: 0mm
EXIT



CLR 

 Input the Prism constant correction
value.
[Example] When prism constant
value is +22mm, prism constant
correction value will be -22mm.
 Press [ENT] key.
Returns to set audio mode.
-
2 2
[ENT]
PRISM SET
PSM: -22mm
EXIT    CLR  
S/A
PSM: -22 SIG : 60
PPM: 83
EXIT PSM PPM T-P
 Input range : -99mm ~ +99mm in 1mm step.
 The normal prism so called "prism constant value 30mm" (or sometimes be called -30mm) will be
set -30mm as a correction value.