Citizen Nighthawk BJ7000-52E User Manual

CONTENTS
A. BEFORE USING .......................................................................................2
B. SETTING THE TIME AND DATE .............................................................3
C. USING AS A DUAL TIME WATCH ...........................................................6
D. FUNCTIONS OF SOLAR POWERED WATCH ........................................8
Insufficient Charge Warning Function......................................................10
Quick Start Function.................................................................................10
Time Setting Warning Function ...............................................................11
Overcharge Prevention Function ............................................................11
E. CARE AND HANDLING DURING CHARGING ......................................12
F. REPLACING THE SECONDARY BATTERY..........................................13
G. TIME REQUIRED FOR CHARGING ......................................................14
H. USING THE SLIDE RULE .......................................................................16
l. PRECAUTIONS ......................................................................................28
J. SPECIFICATIONS ...................................................................................34
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English

Citizen Nighthawk BJ7000-52E Specifications

Operating Environment

accuracy	±15 sec/month
operational temperature range	-10°C to +60°C

Time Features

quartz oscillator frequency	32, 768 Hz
continuous operating time from full recharge to stop	Approx. 6 months
continuous operating time from two second interval movement to stop	Approx. 3 days

Summary

BEFORE USING

SETTING THE TIME AND DATE

Setting the Time

Step-by-step guide to correctly set the watch's time, including the 24-hour hand.

Setting the Date

Instructions for adjusting the watch's date, with precautions for specific times.

USING AS A DUAL TIME WATCH

Correcting the Local Time Hours

Procedure for adjusting the local time hand independently for dual time display.

FUNCTIONS OF SOLAR POWERED WATCH

Insufficient Charge Warning Function

Second hand movement indicates low battery charge; watch stops after 3 days if not recharged.

Quick Start Function

Watch resumes operation quickly after exposure to light, even if fully discharged.

Time Setting Warning Function

Hitch movement indicates incorrect time after a reset; recharge and reset promptly.

Overcharge Prevention Function

Assures users that the watch cannot be overcharged due to a built-in feature.

CARE AND HANDLING DURING CHARGING

Notes on Use

Advice on keeping the watch charged, especially when wearing long sleeves.

Notes On Recharging

Precautions for recharging, including avoiding high temperatures.

REPLACING THE SECONDARY BATTERY

TIME REQUIRED FOR CHARGING

USING THE SLIDE RULE

Navigation Calculator

Explains calculations for navigation like time, speed, distance, and fuel.

General Calculation Functions

Details slide rule use for basic math operations: multiplication, division, and ratios.

PRECAUTIONS

Water-resistance Performance and Usage

Details water resistance levels and their corresponding usage examples.

Watch Cleaning and Maintenance

Guidance on cleaning the watch case, crystal, and band to maintain its condition.

Operating Environment Cautions

Warnings and advice on using the watch within specified temperature and environmental limits.

SPECIFICATIONS