G.R.A.S. Sound & Vibration
Single-channel Low-noise Measuring System consisting of: Type 40HT and Type 12HF - Page 10
2.3 Battery Pack
Togainaccesstothebatterypack,unscrewthelockingscrewontherearpanel(Fig.2.3)and
slide the base plate off towards the rear. Pull out the battery pack See Fig. 2.4.
Thebatterypackconsistofabatteryholderand4xLR14(C)standardalkalinecells.When
replacingthebatteries,replaceallofthemmakingsurethatthepolarityisasindicatedonthe
battery holder.
Fig. 2.4 Showing the battery pack of the Power Module Type 12HF