Nikon DTM-502 Series Instruction Manual page 175

6. SYSTEM DIAGRAM
Measurement Side
External
Ni-Cd battery
type B4E
6
6-1
Tubular
compass Tubular compass
attachment
Battery charger
type Q-B4U/B4E
(with power cord)
External battery
cord type B4-1
DTM-502 series
DTM/PC connecting
cable (9 pin/25 pin)
Personal
computer
115V, 220/240V Quick charger
Q-75U (115V), Q-75E (220/240V)
Diagonal
eyepiece
Low-power
eyepiece (21X)
High-power
eyepiece (41X)
Zenith prism
Solar prism
Solar filter
Solar reticle